I think height of ceiling is probably biggest factor versus length and width. Can you measure ceiling height? I just finished a basement project where I thought I'd do a mini, but realistically due to ceilings being only 8 feet (which actually is high for a basement) decided to go with more smaller ramps as the mini ramp adds a need for a addition footage (i.e., if you have a 2 foot mini ramp, its actually higher than a 2 foot quarter because its "off the ground" if that makes sense).